44 lines
1.3 KiB
Bash
44 lines
1.3 KiB
Bash
#!/bin/bash
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host=$1
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port=$2
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cert=$(echo | openssl s_client -connect "$host":"$port" -servername "$host" 2>/dev/null | openssl x509)
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issuer_hash=$(echo "$cert" | openssl x509 -noout -issuer_hash)
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not_after=$(echo "$cert" | openssl x509 -noout -dates | grep '^notAfter=')
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if [[ -z "$cert" ]] || [[ -z "$issuer_hash" ]] || [[ -z "$not_after" ]]
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then
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echo "UNKNOWN - Could not retrieve certificate! [$host:$port]"
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exit 3
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fi
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warn_days=60
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crit_days=30
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case "$issuer_hash" in
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# 4f06f81d: issuer=C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
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# 8d33f237: issuer=C = US, O = Let's Encrypt, CN = R3
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4f06f81d|8d33f237)
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warn_days=10
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crit_days=3
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;;
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esac
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if ! echo "$cert" | openssl x509 -noout -checkend 0 >/dev/null 2>&1
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then
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echo "CRITICAL - Certificate has expired! [$host:$port] [$not_after]"
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exit 2
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elif ! echo "$cert" | openssl x509 -noout -checkend $((86400 * crit_days)) >/dev/null 2>&1
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then
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echo "CRITICAL - Certificate will expire really soon: [$host:$port] [$not_after]"
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exit 2
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elif ! echo "$cert" | openssl x509 -noout -checkend $((86400 * warn_days)) >/dev/null 2>&1
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then
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echo "WARNING - Certificate will expire soon: [$host:$port] [$not_after]"
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exit 1
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fi
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echo "OK - [$host:$port] [$not_after]"
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exit 0
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